✦ LIBER ✦

The role of the physical factors involved in sound-attenuation characteristics of ear muffs

✍ Scribed by J. Pfretzschner; A. Moreno; C. Colina

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 756 KB
Volume: 36
Category: Article
ISSN: 0003-682X
DOI: 10.1016/0003-682x(92)90070-9

No coin nor oath required. For personal study only.

✦ Synopsis

ABSTRA CT

This paper deals with the assessment of the factors involved in soundattenuation characteristics of ear muffs. To this end, the most common methods (subjective, objective on people, and objective on a test fixture), under free and pseudo-diffusefieM conditions have been used.

The relative importance of these factors in the different measuring methods, their variation with frequency, and the influence of field conditions and the type of head (human or artificial) are studied. Empirical equations are derived that specify the contribution of the individual factors in the different paradigms.

In the light of our results, the apparently discrepant behaviour of ear protectors under different conditions can be explained and correlated.

📜 SIMILAR VOLUMES

Physical factors involved in stress-wave

Physical factors involved in stress-wave-induced cell injury: The effect of stress gradient

✍ Apostolos G. Doukas; Daniel J. McAuliffe; Shun Lee; Vasan Venugopalan; Thomas J. 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 968 KB

The crucial role of the vapour for the s

The crucial role of the vapour for the speed and attenuation of isothermal third sound in unsaturated helium films

✍ G. Bannink; M.G.M. Brocken; I. van Andel; H. van Beelen 📂 Article 📅 1983 🏛 Elsevier Science ⚖ 354 KB

The role of physical and chemical charac

The role of physical and chemical characteristics in assessing the performance of a new biological vascular graft

✍ Roberts, G. ;McCormack, H. ;Ketharanathan, V. ;Macleish, D. G. ;Field, P. L. ;Mi 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 361 KB

Information obtained from physical and chemical characterization of vascular grafts can prove valuable in obtaining a preliminary assessment of potential in vivo performance. The data presented illustrate the concept and show that the new biological graft made from bovine ureters has adequate perfor

Role of steroidogenic factor 1 and aroma

Role of steroidogenic factor 1 and aromatase in temperature-dependent sex determination in the red-eared slider turtle

✍ Crews, David ;Fleming, Alice ;Willingham, Emily ;Baldwin, Ryan ;Skipper, James K 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 779 KB

## Abstract Red‐eared slider turtles are genetically bipotential for sex determination. In this species, as in many other reptiles, incubation temperature of the egg determines gonadal sex. At higher incubation temperatures females are produced and increasing temperature appears to increase estroge

The role of macrophages in stimulation o

The role of macrophages in stimulation of immune induction and myelopoiesis. II: Analysis of genetic restriction involved in the stimulation of granulocyte colony precursors or mature lymphocytes using factors prepared from different recombinant inbred strains of mice

✍ Reginald M. Gorczynski; Gerald B. Price 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 926 KB

Municipalities and energy efficiency in

Municipalities and energy efficiency in countries in transition: Review of factors that determine municipal involvement in the markets for energy services and energy efficient equipment, or how to augment the role of municipalities as market players

✍ Silvia Rezessy; Konstantin Dimitrov; Diana Urge-Vorsatz; Seth Baruch 📂 Article 📅 2006 🏛 Elsevier Science 🌐 English ⚖ 294 KB

It is widely recognized that many cost-efficient opportunities to employ end-use energy efficiency measures exist in countries in transition (CITs) and that municipal authorities have an essential role to play in capturing these opportunities. The aim of this paper is to review the factors that dete